Once Upon a Time: Create-Your-Own Storytelling Cards contains blank cards – both "story" and "ending" cards – that can be customized and added to Once Upon a Time. The first edition of OUaT:CYOSC (for the second edition of OUaT) contains 56 blank cards (40 "story" and 16 "ending"), while the second edition of OUaT:CYOSC (for the third edition of OUaT, with new border artwork matching Omar Rayyan's artwork) contains 55 blank cards (38 "story" and 17 "ending").